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MEDIUM severity

Silverstripe Cross-site scripting vulnerability in VersionedRequestFilterGHSA-mpqj-f4v3-334h

MEDIUMFix: silverstripe/silverstripe-framework@3fa84cf

GHSA-mpqj-f4v3-334h is a medium-severity (CVSS 6.1) vulnerability in silverstripe/framework. A fix is available for silverstripe/framework — see the affected versions and patch details below.

Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 28, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

2 pkgs affected
🐘silverstripe/framework🐘silverstripe/framework

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

A cross-site scripting vulnerability in VersionedRequestFilter has been found.

If an incoming user request should not be able to access the requested stage, an error message is created for display on the CMS login page that they are redirected to. In this error message, the URL of the requested page is interpolated into the error message without being escaped; hence, arbitrary HTML can be injected into the CMS login page.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistsilverstripe/framework≥ 3.3.2&&< 3.3.33.3.3composer require silverstripe/framework:^3.3.3
🐘Packagistsilverstripe/framework≥ 3.4.0&&< 3.4.13.4.1composer require silverstripe/framework:^3.4.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for silverstripe/framework, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update silverstripe/framework to 3.3.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mpqj-f4v3-334h is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

A cross-site scripting vulnerability in VersionedRequestFilter has been found. If an incoming user request should not be able to access the requested stage, an error message is created for display on the CMS login page that they are redirected to. In this error message, the URL of the requested page is interpolated into the error message without being escaped; hence, arbitrary HTML can be injected into the CMS login page.
O3 Security · Impact-Aware SCA

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